[clang] [HLSL] Disable implicit constructors for user-defined structs/classes (PR #194989)

Sat Jun 13 12:59:45 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-gcc-ubuntu` running on `sie-linux-worker3` while building `clang` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/174/builds/36899

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'libFuzzer-x86_64-default-Linux :: fork_corpus_groups.test' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 3
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang   -m64  --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/SimpleTest.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-SimpleTest
# executed command: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang -m64 --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/SimpleTest.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-SimpleTest
# note: command had no output on stdout or stderr
# RUN: at line 4
not  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-SimpleTest -fork=1 -fork_corpus_groups=1 2>&1 | FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/fork_corpus_groups.test --check-prefix=BINGO
# executed command: not /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-SimpleTest -fork=1 -fork_corpus_groups=1
# note: command had no output on stdout or stderr
# executed command: FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/fork_corpus_groups.test --check-prefix=BINGO
# note: command had no output on stdout or stderr
# RUN: at line 7
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang   -m64  --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-TimeoutTest
# executed command: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang -m64 --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/TimeoutTest.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-TimeoutTest
# note: command had no output on stdout or stderr
# RUN: at line 8
not  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-TimeoutTest -fork=1 -fork_corpus_groups=1 -timeout=1 -ignore_timeouts=0 2>&1 | FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/fork_corpus_groups.test --check-prefix=TIMEOUT
# executed command: not /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-TimeoutTest -fork=1 -fork_corpus_groups=1 -timeout=1 -ignore_timeouts=0
# note: command had no output on stdout or stderr
# executed command: FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/fork_corpus_groups.test --check-prefix=TIMEOUT
# note: command had no output on stdout or stderr
# RUN: at line 11
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang   -m64  --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/OutOfMemoryTest.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-OutOfMemoryTest
# executed command: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang -m64 --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/OutOfMemoryTest.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-OutOfMemoryTest
# note: command had no output on stdout or stderr
# RUN: at line 12
not  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-OutOfMemoryTest -fork=1 -fork_corpus_groups=1 -ignore_ooms=0  -rss_limit_mb=128 2>&1 | FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/fork_corpus_groups.test --check-prefix=OOM
# executed command: not /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-OutOfMemoryTest -fork=1 -fork_corpus_groups=1 -ignore_ooms=0 -rss_limit_mb=128
# note: command had no output on stdout or stderr
# executed command: FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/fork_corpus_groups.test --check-prefix=OOM
# note: command had no output on stdout or stderr
# RUN: at line 16
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang   -m64  --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/ShallowOOMDeepCrash.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash
# executed command: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/./bin/clang -m64 --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/lib/fuzzer /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/compiler-rt/test/fuzzer/ShallowOOMDeepCrash.cpp -o /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash
# note: command had no output on stdout or stderr
# RUN: at line 18
not  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash -fork=1 -fork_corpus_groups=1 -rss_limit_mb=128 >/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash.log 2>&1
# executed command: not /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash -fork=1 -fork_corpus_groups=1 -rss_limit_mb=128
# note: command had no output on stdout or stderr
# RUN: at line 19
not  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash -fork=1 -fork_corpus_groups=1 -rss_limit_mb=128 >>/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash.log 2>&1
# executed command: not /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash -fork=1 -fork_corpus_groups=1 -rss_limit_mb=128
# note: command had no output on stdout or stderr
# RUN: at line 20
not  /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash -fork=1 -fork_corpus_groups=1 -rss_limit_mb=128 >>/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash.log 2>&1
# executed command: not /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/runtimes/runtimes-bins/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fork_corpus_groups.test.tmp-ShallowOOMDeepCrash -fork=1 -fork_corpus_groups=1 -rss_limit_mb=128
...

```

</details>

https://github.com/llvm/llvm-project/pull/194989